CN100459544C - Prefix delegation system and method of ad-hoc network - Google Patents
Prefix delegation system and method of ad-hoc network Download PDFInfo
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- CN100459544C CN100459544C CNB2005100846603A CN200510084660A CN100459544C CN 100459544 C CN100459544 C CN 100459544C CN B2005100846603 A CNB2005100846603 A CN B2005100846603A CN 200510084660 A CN200510084660 A CN 200510084660A CN 100459544 C CN100459544 C CN 100459544C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/161—Implementation details of TCP/IP or UDP/IP stack architecture; Specification of modified or new header fields
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/167—Adaptation for transition between two IP versions, e.g. between IPv4 and IPv6
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
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Abstract
A method, medium, and system for connecting to a communication system in a network having a plurality of nodes capable of communicating with each other. The node requests an identifier to a foreign network when a router advertise (RA) message is received from the foreign network, and then the node connects to the communication system, via the foreign network, by use of the received identifier. A method, medium, and system for delegating a network identifier (prefix) from a server of a foreign network, in a network having a plurality of nodes capable of communicating with each other, so that a node can communicate with the foreign network. The prefix to be used by the nodes in the network is transmitted from the server of the foreign network to the node.
Description
Technical field
Generally speaking, embodiments of the invention relate to a kind of interim (ad-hoc) network.More particularly, embodiments of the invention relate to internet access (connection) System and method for of a kind of casual network.
Background technology
General mobile communication system transmits data between portable terminal and base station.In other words, portable terminal and base station be transceive data directly, and not by other nodes.Different therewith, in casual network, other nodes may be in the future from the beginning the data relaying of source node give destination node.
Casual network may be the network by the spontaneous structure of mobile node.Because guarantee node mobility possibly, so casual network has structure very flexibly.Casual network makes it may be at enabling communication between nodes, and does not need the support of conventional mobile communication system, and supports repeatedly the transmission of great-jump-forward.Thus, may be without limits for communication distance.
In the various application of casual network, people are discussing the connection to the internet recently.At length say, this discussion major concern be how to utilize internet gateway (I/G) casual network to be connected to (access) internet.
Fig. 1 shows existing casual network, internet and the I/G that will connect casual network and internet that considers at present.Yet the following problem of explaining existing system with reference to Fig. 1.
Summary of the invention
Proposing embodiments of the invention is above-mentioned and other shortcomings and the problems that take place in the conventional structure in order to solve, one aspect of the present invention provides a kind of System and method for, make to have guaranteed in the casual network that ambulant node can be connected to the internet, and no matter its position how.
Another aspect of the present invention provides a kind of method and system, is used for distributing focusing on the service traffics of single internet gateway.
Another aspect of the present invention provides a kind of method and system, is used for assigning efficiently the prefix of (delegate) predetermined number.
In order to obtain above-mentioned and/or other aspects and advantage, embodiments of the invention provide a kind of method that connects node in the network, this network comprises a plurality of nodes that can intercom mutually, this method comprises: when receive router advertisement (router advertise from external network, RA) during message, to this external network request identifier; And utilize the identifier of being received, be connected to communication system by this external network.Described communication system can be in-house network or internet.
Described node can send the RA message that comprises the identifier that is received by a plurality of nodes in network.
In addition, when at least two nodes were received the RA message that comprises the identifier that is received, this method also comprised: according to the priority that receives in the identifier, the node of selecting to select from these at least two nodes is the gateway to communication system.The node of receiving request identifier in the node of RA message can be used as gateway, directly or indirectly described Networks and Communications system is connected, receives that wherein another node of RA message is used as candidate gateways.In addition, node in the described network can be by utilizing gateway node or candidate gateways, send or receive whereabouts or from the packet of communication system, and the node that sends or receive packet in the described network can select gateway node or candidate gateways to come with the bag that transmits and receive data by comparing the service traffics size of gateway node and candidate gateways.
Both candidate nodes can be created the tunnel to communication system, and the tunnel that passes through to be created sends and the reception packet.Gateway node also can utilize described external network to send and the packet that receives to communication system.
In order to obtain above-mentioned and/or other aspects and advantage, thereby embodiments of the invention provide a kind of node of being assigned in these a plurality of nodes of network identifier that are used for discerning by the server of external network in the network that comprises a plurality of nodes that can intercom mutually can pass through this external network and communication system method for communicating, comprise: when receiving router advertisement (RA) message from external network, to the server requests dispatch network identifier of external network; And receive network identifier, and by external network, to being designated as thus to the node dispatch network identifier of the gateway of communication system from the server of external network.Herein, network identifier can be prefix, and described communication system can be in-house network or internet.
The request network identifier is assigned and can be comprised: generate the identifier that comprises request network identifier node that assign, that be appointed as gateway and this network local identifier solicit (solicit) message; And send the solicitation message generated.
In addition, when at least two nodes were received RA message, the priority in assign receiving according to network identifier can select a node in these at least two nodes as the node of being appointed as gateway.Receive that node network identifier, that be appointed as gateway can send the RA message that comprises this network identifier by other nodes in network.In addition, at least two nodes receiving RA message from external network, can be used as the gateway of communication system to server requests network identifier node that assign, that be appointed as gateway, and another node in these at least two nodes can be used as the candidate gateways to communication system.When at the fixed time at interval not when the node of being appointed as gateway is received RA message, the candidate gateways node also can be used as the gateway to communication system.
This method can also comprise: request is assigned the network identifier of being assigned again to the candidate gateways node, thereby this candidate gateways node can be used as the default gateway to communication system.Again assigning the network identifier assigned can comprise: the solicitation message that sends the identifier of the identifier of the node that comprises the network identifier of being assigned, is appointed as gateway and candidate gateways node; And when the information matches that comprises in solicitation message is stored in information in the server in advance,, be default gateway so that candidate gateways is reassigned by server dispatch network identifier again.
In order to obtain above-mentioned and/or other aspects and advantage, embodiments of the invention provide an a kind of medium and/or a plurality of medium that comprises that comprises the computer-readable code of realizing embodiments of the invention.
In order to obtain above-mentioned and/or other aspects and advantage, embodiments of the invention provide a kind of networking (networking) system a plurality of nodes, that communicate by external network and communication system that comprises, this networked system comprises: gateway node, when receiving router advertisement (RA) message from external network, this gateway node communicates by external network and communication system based on to outside network requests identifier and receive this network identifier; And candidate gateways node, this candidate gateways node is based on receive RA message from external network, under the prerequisite that does not communicate with external network, communicate by tunnel and communication system, wherein the node in this networked system can optionally communicate with communication system by described at least gateway node and/or both candidate nodes.
In case carried out following operation, then the candidate gateways node can be reassigned for the new gateway node to substitute described gateway node: the candidate gateways node sends the solicitation message of the identifier of the identifier that comprises described identifier, described gateway node and candidate gateways node, and when the information matches that comprises in solicitation message was stored in information in the server in advance, assigning identifier again by server was default gateway so that candidate gateways is reassigned.In case do not receive RA information from gateway node after cycle time, then the candidate gateways node can send solicitation message, and the described time cycle be the random time cycle, they are different in each candidate gateways.In addition, described candidate gateways can be the shortest one of time cycle described in all candidate gateways.
Others of the present invention and/or advantage will partly be illustrated in description subsequently, and partly are clearly from the following description, maybe can learn by putting into practice the present invention.
Description of drawings
From the description of following embodiment, in conjunction with the accompanying drawings, above-mentioned these and/or others of the present invention and characteristic advantages will be clearer and be more readily understood, in described accompanying drawing:
Fig. 1 shows the existing casual network that is connected to the internet;
Fig. 2 shows according to an embodiment of the invention, is connected to the casual network of internet;
Fig. 3 shows according to an embodiment of the invention, the node searching internet gateway in the casual network;
Fig. 4 A and 4B show according to an embodiment of the invention, create to the transmit frame structure of candidate's internet gateway in the tunnel of internet;
Fig. 5 shows according to an embodiment of the invention, assigns in the global prefixes at default internet gateway place;
Fig. 6 shows according to an embodiment of the invention, the generation of identity associated identifiers (IAID); And
Fig. 7 shows according to an embodiment of the invention, is allowed to use candidate's internet gateway of global prefixes.
Specific embodiment
Now will be in detail with reference to embodiments of the invention, its example illustrates in the accompanying drawings, and wherein identical reference number is from start to finish represented components identical.These embodiment are described below with by explaining the present invention with reference to the accompanying drawings.
According to embodiments of the invention, some node in the casual network can be used as internet gateway (I/G).If service traffics concentrate on specific I/G, then service traffics can be distributed to other I/G.In addition, can be each network dispatch network identifier (prefix).
Fig. 2 shows the casual network 200 of communicating by letter with internet 230, the WLAN (WLAN) that is connected casual network 200 and internet 230.Specifically, the WLAN among Fig. 2 comprises access point (AP) 210 and couple in router (AR) 220.Except that AP 210 and AR 220, WLAN can also comprise other assemblies, but has only shown that these assemblies are to promote understanding of the present invention.WLAN among Fig. 2 can connect casual network 200 and internet 230, but is not limited to this system.Can using arbitrarily, other communication systems connect casual network 200 and internet 230.In addition, embodiments of the invention are not limited to the internet, but can be used for the replacement system, and for example proprietary WLAN, LAN or in-house network please note also available other replacement systems.
Below describe to explain and casual network 200 at first can be connected (access) with the AR 220 of WLAN, to set up being connected between casual network 200 and the internet 230.For example, can set up being connected between AR 220 and the internet 230 according to existing method.
AR 220 can generate at interval to schedule and provide router advertisement (RA) message to AP 210.Then, AP 210 can give casual network 200 with the RA forwards of being received.RA message from AP 210 can be received by at least one node in the casual network 200.According to embodiments of the invention, the node that receives RA message is used as I/G.Yet certainly,, there is not node can receive RA message in the casual network 200 if the distance between AP 210 and the casual network 200 has surpassed the range of receiving of RA message at all.Therefore, after this will be based on having at least a node to receive that RA message describes embodiments of the invention in the casual network 200
In case receive global prefixes from AP 210, then node 2 can will comprise at interval to schedule that the RA message of global prefixes sends other nodes in the casual network 200 to.In case receive RA message, then node 1 and 3 is not to AP 210 request global prefixes.That is,, then receive that from other nodes the node of the RA message that comprises global prefixes is used as C-I/G if receive the RA message that comprises global prefixes from another node from the node of AP 210 reception RA message.
Suppose that a plurality of nodes in the casual network ask to send packet to D-I/G at special time simultaneously.As a result of, D-I/G may transship, and D-I/G possibly can't promptly send to internet 230 with the packet that is generated.In order to address these problems, according to the embodiment of the invention, some function of D-I/G can be replaced carrying out by other nodes.Specifically, other nodes of some function of execution D-I/G can be the C-I/G nodes.
If the number of data packets of D-I/G transmitting-receiving surpasses set point, then request can send to C-I/G with the data of going to internet 230 with the node of Internet traffic.If the C-I/G more than is arranged in casual network 200, then can be provided with and select a C-I/G, the nearest C-I/G of node that for example can the chosen distance packet goes to according to the user.
According to above-mentioned, when sending selection I/G for packet, can be with respect to the given priority of D-I/G.Yet the node all right (for example) of wishing access 230 is to whole casual network 200 multicast I/G search messages.The following method of utilizing this I/G search message selection to be used for the I/G of packet transmission of describing with reference to Fig. 3.
Node possibility multicast I/G search message (S300) in the casual network, and receive that the I/G of I/G search message can generate search response message (S320).Search response message can comprise (for example) prefix (identifier) information, service traffics information or the like.Then, I/G sends to node (S304) with the search response message that is generated.Then, node can be selected suitable, the basic optimum packet of I/G to be generated to its forwarding by utilizing the search response message of being received.More particularly,, can be included in service traffics information and distance in the search response message, select suitable, basic optimum I/G according to (for example) from node to I/G when when receiving search response message more than two I/G.Therefore, send to carry out packet, just may prevent the overload of specific I/G by utilizing (for example) service traffics Information Selection I/G suitable, basic optimum.
As mentioned above, receive that the C-I/G (node 1 or node 3) of the packet of going to internet 230 can be set up to the route of internet 230 respective nodes.Notice that C-I/G can the mode different with the method for routing of D-I/G be provided with route.Because casual network 200 can use single global prefixes, so, then may cause to send confusion if the node on the internet 230 sends packet to the I/G more than two.In order to prevent to send confusion, C-I/G can create the tunnel of 230 respective nodes to the internet, and can utilize the IPv6 route header.Then, C-I/G can utilize the tunnel created to send and receive whereabouts and from the packet of respective nodes.
Fig. 4 A and 4B show the packet structure that is used for routing configuration between C-I/G and internet 230 respective nodes.Specifically, Fig. 4 A shows the configuration of routers of utilizing two IPv6 heads, and Fig. 4 B shows the configuration of routers of utilizing an IPv6 head and a route header.The present structure of data of description bag in more detail.
In Fig. 4 A, IPv6 head 400 can comprise (for example) destination node identifier 410 and source node identifier 412.IPv6 head 402 can comprise (for example) destination node identifier 414 and source node identifier 416.Destination node identifier 410 can be the identifier of internet respective nodes, and source node identifier 412 can be the identifier of I/G (C-I/G).Destination node identifier 414 can be the identifier of internet 230 respective nodes, and source node identifier 416 can be for generating the identifier of the node of the packet that is ready for sending in the casual network 200.Data 404 can comprise the packet that is ready for sending.Can utilize two destination node identifiers 410 and 414 and two source node identifiers 412 and 416 to transmit the packet that is generated.Say simply, can only be used to source node identifier and destination node sign and directly receive and dispatch the packet that is generated.
In Fig. 4 B, the destination node identifier 430 of IPv6 head 420 can be the identifier of AR and the identifier of internet 230 respective nodes.Source node identifier 432 can be the identifier of the node that generates packet to be sent in the casual network 200, and route header 422 can comprise the identifier of respective nodes on AR and the internet 230.
Below describe to have described in detail and assign according to the global prefixes embodiment of the invention, that D-I/G carries out.At first, when in casual network when assigning prefix more than one I/G, can have problems.When single network is assigned different prefixes, the multiplicity of prefix can produce mistake.In addition, when when a network is assigned a plurality of prefix, then other networks can need extra prefix.
Explain the global prefixes assignment at D-I/G place referring now to Fig. 5.Herein, term " overall situation " is used for inferring to a casual network and assigns a prefix.
In case receive RA message from AP 210, then D-I/G can generate DHCP (DHCP) unique identifier (DUID) and identity associated identifiers (IAID) (S500).Can utilize corresponding M AC address to generate DUID, and can utilize corresponding website local address to generate IAID.
The frame structure that in Fig. 6, shows the website local address.The generation of IAID is described referring now to the frame structure of website local address.
Can utilize the website local address to generate IAID, specifically, (for example) utilizes 32 in the website local address fore-end, please notes that IAID may be above 32, perhaps be provided with according to the user, (for example) utilizes other parts of website local address to generate IAID.
Referring again to Fig. 5, D-I/G can send the solicitation message (S502) that comprises IAID and DUID to server.(for example) can send this solicitation message to server by AP 210 and AR 220.Generally speaking, server is connected to AR 210.Solicitation message comprises IAID, is used for asking global prefixes.In case receive solicitation message, then server just can be discerned DUID and the IAID of D-I/G, and IAID and IA_PD (Identity Association for Prefix Delegation, the identity association that prefix is assigned) are stored as prefix list together.
Then, as the response to solicitation message, server can generate advertisement information, and advertisement information is sent to D-I/G (S504).This advertisement information can comprise the global prefixes by the D-I/G request.Then, server can be selected a global prefixes according to information that is provided and available global prefixes, and selected global prefixes is appended on the advertisement information.Therefore, the global prefixes branch can be tasked D-I/G.
D-I/G can send a request message to server (S506), and wherein this request message is confirmed the global prefixes of being assigned.Server can send receive the response accordingly (S508) to D-I/G then.
Then, D-I/G sends to other nodes in the casual network 200 with the global prefixes of being assigned.Herein, D-I/G (for example) can comprise the RA message of global prefixes and link layer address option according to preset time at interval to casual network 200 multicasts.In case receive multicast RA message, then the node in the casual network can be discerned the global prefixes of being assigned.
Below describe outside D-I/G moves to network and become situation in the time of to work.As mentioned above, D-I/G can be according to preset time interval multicast RA message.Yet if the position change of D-I/G, possibly of D-I/G can't multicast RA message.Thus, if do not receive RA message at interval at preset time, then C-I/G can determine at the D-I/G place mistake to have taken place, that is, C-I/G can determine that D-I/G no longer can provide the D-I/G function.As a result of, C-I/G can be used as D-I/G.
Under the situation of existence more than two C-I/G, according to predefined procedure, a C-I/G can be used as D-I/G in casual network.The operation of C-I/G is below described.If do not receive RA message from D-I/G, then C-I/G can check the connection to D-I/G after a time of delay, and for example is set at random this time of delay.When determining to disconnect when being connected with D-I/G, C-I/G to server transmission solicitation message to ask global prefixes.Because for set difference time of delay of each C-I/G, so once can only there be a C-I/G wherein to have the first request of the C-I/G execution of lowest latency time to the server requests global prefixes to global prefixes.Subsequently, after this all C-I/G that receive RA message from this C-I/G are no longer to the server requests global prefixes, that is, because C-I/G has asked global prefixes and will be as new D-I/G, so do not need remaining C-I/G request global prefixes.
In order to be used as D-I/G, this C-I/G need provide information needed to server.Referring now to Fig. 7 operation between C-I/G and the server is described.
C-I/G can send solicitation message (S700) to server.If this C-I/G can not be used as D-I/G after having sent solicitation message, then another C-I/G will send solicitation message.As mentioned above, because casual network has used the global prefixes of being assigned, so do not need to assign once more new global prefixes.Unique requirement is that (for example) determines whether C-I/G and D-I/G are arranged in same casual network.
In order to satisfy above demand, solicitation message can comprise DUID, the IAID of C-I/G and the DUID of D-I/G.In case receive solicitation message, then reminding service device C-I/G wished to be used as D-I/G.Specifically, server will be arranged in same casual network by utilizing IAID identification C-I/G and D-I/G, and wish to be used as D-I/G by the DUID identification C-I/G that utilizes D-I/G.
Comprise in solicitation message under the situation of quick submission (commit) option, receive that the server of this solicitation message can send receive the response (S702) to this C-I/G.Compare with operation described in Fig. 5, C-I/G will be allowed to utilize global prefixes again by these two message.Subsequently, this C-I/G can be used as D-I/G.
Following table 1 has shown the example structure of solicitation message.
Table 1
Herein, transaction-id can be message identifier, and the client identifier option can comprise IAID, and IA_PD can comprise length, time-to-live parameter of required prefix or the like, and client identifier is exchanged option can comprise DUID.
Consider above-mentionedly, as mentioned above, some node in the casual network can be used as I/G, thereby may guarantee in the casual network that ambulant node can enter the Internet, and no matter its position how.If service traffics concentrate on specific I/G, then service traffics can be distributed to other I/G, removed the network performance decrease reason thus, for example data-bag lost and packet propagation delay.In addition, can assign a network identifier (prefix) to each network, thus obscuring of preventing that possible limited number owing to the multiplicity of prefix and prefix from causing.
Except the foregoing description, embodiments of the invention can also pass through on the medium (for example computer-readable medium)/in computer readable code/instructions realize.This medium can be corresponding to any single/a plurality of media that allow storage and/or transmission computer-readable code.
Computer-readable code can record/transmission on medium in many ways, the example of this medium comprises magnetic storage medium (for example ROM, floppy disk, hard disk or the like), optical recording media (for example CD-ROM or DVD), and the storage/transmission medium of carrier wave for example, and (for example) is by internet record/transmission.This medium can also be distributed network, thereby with distribution mode storage/transmission and computer readable code executed.
Though demonstration has also been described several embodiments of the present invention, those skilled in the art should understand that under the prerequisite that does not break away from spirit of the present invention and principle and can change these embodiments that scope of the present invention is defined by the claims.
The application requires the priority at the korean patent application 2004-55134 of Korea S Department of Intellectual Property submission on July 15th, 2004 according to 35U.S.C. § 119 (a), and these whole disclosures are incorporated into therewith by reference.
Claims (25)
1. the specific node in the network that will comprise a plurality of nodes that can intercom mutually is connected to the method for communication system, and this method comprises:
In response to the router advertisement RA message of receiving from external network, by this specific node to the described identifier that comprises the network of a plurality of nodes that can intercom mutually of this external network request; And
The identifier that this specific node utilization is received from this external network is connected to this communication system by this external network.
2. the method for claim 1, wherein said communication system is in-house network or internet.
3. the method for claim 1, wherein said specific node a plurality of nodes in network send the RA message that comprises the identifier that is received.
4. the method for claim 1, wherein when at least two nodes in response to described RA message to outside network requests described identifier and when receiving the RA message that comprises the identifier that is received, this method also comprises: according to the order of receiving identifier, the node of selecting to select from these at least two nodes is as the gateway node to communication system.
5. method as claimed in claim 4 receives that wherein the node of request identifier in the node of RA message is used as gateway node, directly or indirectly described Networks and Communications system is connected, receives that wherein another node of RA message is used as candidate gateways.
6. the method for claim 1, first node of receiving RA message is as the gateway node to communication system in wherein said a plurality of nodes.
7. method as claimed in claim 5, the node in the wherein said network send packet and receive packet to communication system or from communication system by utilizing gateway node or candidate gateways.
8. method as claimed in claim 7, the node that sends or receive packet in the wherein said network be by the service traffics with candidate gateways of gateway node relatively, selection gateway node or the candidate gateways bag that transmits and receive data.
9. method as claimed in claim 7, wherein candidate gateways is created the tunnel to communication system, and the tunnel that passes through to be created sends and the reception packet.
10. method as claimed in claim 7, wherein gateway node utilizes described external network to send and the packet that receives to communication system.
Thereby 11. one kind in the network that comprises a plurality of nodes that can intercom mutually, assign the node that is used for discerning in described these a plurality of nodes of network of network identifier that comprise a plurality of nodes that can intercom mutually and can pass through this external network and communication system method for communicating by the server of external network, comprising:
When receiving router advertisement RA message from external network, receive that a conduct in the node of RA message is designated as by the gateway node of external network to communication system, to the server requests dispatch network identifier of external network; And
The server of this external network is appointed as the node dispatch network identifier of gateway to this.
12. method as claimed in claim 11, the wherein said node that is designated as gateway is that first receives the node of RA message in described a plurality of node.
13. method as claimed in claim 11, wherein said network identifier are prefix.
14. method as claimed in claim 11, wherein said communication system are in-house network or internet.
15. method as claimed in claim 11 is wherein asked network identifier to be assigned and is comprised: the solicitation message that generates the local identifier of the identifier that comprises request network identifier node that assign, that be appointed as gateway and this network; And send the solicitation message generated.
16. method as claimed in claim 11 receives that wherein node network identifier, that be appointed as gateway other nodes in network send the RA message that comprises this network identifier.
17. method as claimed in claim 11, wherein the node of being appointed as gateway of assigning to the server requests network identifier at least two nodes receiving RA message from external network is used as the gateway of communication system, and other nodes in these at least two nodes are used as the candidate gateways node to communication system.
18. method as claimed in claim 17, wherein when at the fixed time at interval not when the node of being appointed as gateway is received RA message, the candidate gateways node is used as the gateway to communication system.
19. method as claimed in claim 18 also comprises: request is assigned the network identifier of being assigned again to the candidate gateways node, thereby this candidate gateways node can be used as the default gateway to communication system.
20. method as claimed in claim 19 is wherein assigned the network identifier of being assigned again and is comprised:
The solicitation message of the identifier of the node that transmission comprises the network identifier of being assigned, be appointed as gateway and the identifier of candidate gateways node; And
When the information matches that comprises in solicitation message is stored in information in the server in advance,, be default gateway so that the candidate gateways node is reassigned by server dispatch network identifier again.
21. one kind comprise a plurality of nodes, by the networked system that external network and communication system communicate, this networked system comprises:
Gateway node, when receiving router advertisement RA message from external network, this gateway node is based on the identifier of the network that comprises described a plurality of nodes to outside network requests and receive this identifier, communicates by external network and communication system; And
The candidate gateways node, it is based on receiving RA message from external network, under the prerequisite that does not communicate with external network, communicate by tunnel and communication system;
Wherein the node in this networked system optionally communicates by described gateway node and/or candidate gateways node and communication system.
22. networked system as claimed in claim 21, wherein in case carried out following operation, then the candidate gateways node is reassigned for the default gateway node to substitute described gateway node: the candidate gateways node sends the solicitation message of the identifier of the identifier that comprises described identifier, described gateway node and candidate gateways node, and when the information matches that comprises in solicitation message was stored in information in the server of external network in advance, assigning identifier again by this server was default gateway so that the candidate gateways node is reassigned.
23. networked system as claimed in claim 22, in a single day wherein, gateway node periodically sends RA message to the candidate gateways node, and does not receive RA message from gateway node after cycle time, and then the candidate gateways node sends solicitation message.
24. networked system as claimed in claim 23, the wherein said time cycle is the random time cycle, and they are different in each candidate gateways node.
25. networked system as claimed in claim 24, the candidate gateways node of wherein said transmission solicitation message are the shortest one of time cycle described in all candidate gateways nodes.
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| US7934198B2 (en) * | 2003-10-17 | 2011-04-26 | Netlogic Microsystems, Inc. | Prefix matching structure and method for fast packet switching |
| WO2008110715A1 (en) * | 2007-02-16 | 2008-09-18 | France Telecom | Methods and devices for discovering a gateway and for routing towards said gateway in a hybrid wireless network |
| KR100969802B1 (en) * | 2008-08-27 | 2010-07-13 | 성균관대학교산학협력단 | APPARATUS AND METHOD FOR ROUTING BASED ON PROXY MOBILE IPv6 NETWORK AND MOBILE AD HOC NETWORK |
| CN101572712B (en) * | 2009-06-09 | 2012-06-27 | 杭州华三通信技术有限公司 | Method for preventing attack of counterfeit message and repeater equipment thereof |
| US8995360B2 (en) * | 2011-06-09 | 2015-03-31 | Time Warner Cable Enterprises Llc | Techniques for prefix subnetting |
| JP5673840B2 (en) * | 2011-09-20 | 2015-02-18 | 富士通株式会社 | Node device and communication method |
| CN104254128A (en) * | 2013-06-25 | 2014-12-31 | 掌通万维(北京)科技有限公司 | Networking method and equipment in Internet of things |
| FR3058293B1 (en) * | 2016-10-28 | 2019-05-10 | Sagemcom Energy & Telecom Sas | METHOD FOR SELECTING A GATEWAY FOR TRANSMITTING A FRAME |
| CA3107919A1 (en) | 2018-07-27 | 2020-01-30 | GoTenna, Inc. | Vinetm: zero-control routing using data packet inspection for wireless mesh networks |
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| US20060013193A1 (en) | 2006-01-19 |
| KR100626676B1 (en) | 2006-09-25 |
| CN1722692A (en) | 2006-01-18 |
| KR20060006222A (en) | 2006-01-19 |
| JP4114939B2 (en) | 2008-07-09 |
| US7620366B2 (en) | 2009-11-17 |
| JP2006033855A (en) | 2006-02-02 |
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